Signatory. Mystery plan is a plan to sign an agreement with the author, aiming at promoting and supporting the author's submission as the exclusive agent of copyright. The "Mystery Plan" is the signatory. After the submission is confirmed, an agreement will be signed with the author to become the exclusive copyright agent for the whole line of works, including but not limited to Internet traffic support, paper book publishing, well-known magazine publishing, writers' association recommendation, omnichannel recommendation support and incubation of cinema movies, TV series, animation and audio copyright.